So i use a Supercard DSonei but i get the feeling that doesnt really matter,

My supercard and microsd works fine when in my DSi, it still plays my ROMs with my save files but now i want to put KH:358/2 on there too.

So i go to plug my micro sd into my reader and then the reader into my laptop and at first it says USB device not recognized. i restart my laptop. Now that error does not come up but when i go to my computer and then "removable disk (L)" it comes up blank as if nothing is on my micro sd. I know there is. i just put it back in my SC and my DSi and saw the files still there.

What's wrong? How do i fix this?

EDIT: Now im getting the USB device not recognized error again.

Is it my micro sd reader? I'm just using the one that came with my SC and it worked fine before though i havent used it in a while.